CVE catalog
CVE-2018-1000164
gunicorn: CVE-2018-1000164
- Severity
- High · CVSS 7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.37% · Oct 25, 2026
gunicorn version 19.4.5 contains a CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers vulnerability in "process_headers" function in "gunicorn/http/wsgi.py" that can result in an attacker causing the server to return arbitrary HTTP headers. This vulnerability appears to have been fixed in 19.5.0.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | gunicorn | sid | 26.2.2-2 | fixed |
| Debian | gunicorn | forky | 26.2.2-2 | fixed |
| Debian | gunicorn | trixie | 23.0.0-1 | fixed |
| Debian | gunicorn | bookworm | 20.1.0-6+deb12u1 | fixed |
| Pip | gunicorn | Not reported | 19.5.0 | fixed |
| Ubuntu | gunicorn | 16.04 | 19.0-8ubuntu1 | vulnerable |
| Ubuntu | gunicorn | 16.04 | 19.4.1-1ubuntu1 | vulnerable |
| Ubuntu | gunicorn | 16.04 | 19.4.5-1ubuntu1 | vulnerable |
| Ubuntu | gunicorn | 16.04 | 19.4.5-1ubuntu1.1 | fixed |
| Ubuntu | gunicorn | pro | 17.5-2 | vulnerable |
| Ubuntu | gunicorn | pro | 17.5-2build1 | vulnerable |
| Ubuntu | gunicorn | pro | 17.5-2ubuntu0.1~esm1 | fixed |
| Ubuntu | gunicorn | 16.04 | 19.0-8ubuntu1 | vulnerable |
| Ubuntu | gunicorn | 16.04 | 19.4.1-1ubuntu1 | vulnerable |
| Ubuntu | gunicorn | 16.04 | 19.4.5-1ubuntu1 | vulnerable |
| Ubuntu | gunicorn | 16.04 | 19.4.5-1ubuntu1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | gunicorn | source | sid | 19.5.0-1 | not yet assigned | Not reported | [896548] |
| Debian | gunicorn | source | forky | 19.5.0-1 | not yet assigned | Not reported | [896548] |
| Debian | gunicorn | source | trixie | 19.5.0-1 | not yet assigned | Not reported | [896548] |
| Debian | gunicorn | source | bookworm | 19.5.0-1 | not yet assigned | Not reported | [896548] |
| Pip | gunicorn | pip | Not reported | 19.5.0 | Not reported | GHSA-32PC-XPHX-Q4F6 | Not reported |
| Ubuntu | gunicorn | deb | 16.04 | 19.4.5-1ubuntu1.1 | Not reported | USN-4022-1 | Not reported |
| Ubuntu | gunicorn | deb | pro | 17.5-2ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2018-1000164 | Not reported |
| Ubuntu | gunicorn | deb | 16.04 | 19.4.5-1ubuntu1.1 | Not reported | UBUNTU-CVE-2018-1000164 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [gunicorn]Fixed
Details (2)
20.1.0-6+deb12u1· all · bookwormFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · bookworm; dsa · gunicorn · debian · 12
20.1.0-6+deb12u1· all · bookwormFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · bookworm; dsa · gunicorn · debian · 12
- [gunicorn-examples]Fixed
Source package: [gunicorn]
Details (2)
20.1.0-6+deb12u1· all · bookwormFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · bookworm; dsa · gunicorn · debian · 12
20.1.0-6+deb12u1· all · bookwormFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · bookworm; dsa · gunicorn · debian · 12
- [python3-gunicorn]Fixed
Source package: [gunicorn]
Details (2)
20.1.0-6+deb12u1· all · bookwormFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · bookworm; dsa · gunicorn · debian · 12
20.1.0-6+deb12u1· all · bookwormFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · bookworm; dsa · gunicorn · debian · 12
[Debian 13 (Trixie)]
- [gunicorn]Fixed
Details (2)
23.0.0-1· all · trixieFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · 13
23.0.0-1· all · trixieFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · 13
- [gunicorn-examples]Fixed
Source package: [gunicorn]
Details (2)
23.0.0-1· all · trixieFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · 13
23.0.0-1· all · trixieFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · 13
- [python3-gunicorn]Fixed
Source package: [gunicorn]
Details (2)
23.0.0-1· all · trixieFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · 13
23.0.0-1· all · trixieFixed · Fixed:
19.5.0-1dsa · gunicorn · debian · 13
Observed:
References
- [https://github.com/advisories/GHSA-32pc-xphx-q4f6]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2018-1000164]
- [https://osv.dev/vulnerability/DLA-1357-1]
- [https://osv.dev/vulnerability/DSA-4186-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2018-1000164]
- [https://osv.dev/vulnerability/USN-4022-1]
- [https://security-tracker.debian.org/tracker/CVE-2018-1000164]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [OSV Package Vulnerability Database]